	US 12,215,176 B2
	Method for preparing polymer
Jeong A Hwang, Daejeon (KR); Dae Young Shin, Daejeon (KR); and Eun Jung Joo, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/627,568
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jul. 1, 2021, PCT No. PCT/KR2021/008314 § 371(c)(1), (2) Date Jan. 14, 2022, PCT Pub. No. WO2022/014910, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 10-2020-0088684 (KR), filed on Jul. 17, 2020.
Prior Publication US 2023/0331885 A1, Oct. 19, 2023
Int. Cl. C08F 212/10 (2006.01); B01D 53/00 (2006.01); C08F 6/00 (2006.01); C08F 6/12 (2006.01)

CPC C08F 212/10 (2013.01) [B01D 53/002 (2013.01); C08F 6/003 (2013.01); C08F 6/12 (2013.01); B01D 2257/708 (2013.01)]

12 Claims

1. A method of preparing a polymer, the method comprising:

supplying a monomer stream and a solvent stream to a reactor and performing a polymerization reaction to prepare a reaction product;

supplying a reactor discharge stream to a volatilization device comprising the reaction product, separating a polymer from a lower portion of the volatilization device, and splitting an upper discharge stream including an unreacted monomer, a solvent, and an inert gas into two or more streams comprising a first stream and a second stream;

supplying the first stream to a first condenser and the second stream to a second condenser;

at the first condenser, condensing and separating unreacted monomer and solvent and supplying a third gaseous stream to the second condenser; and

supplying a gaseous stream discharged from the second condenser to a vacuum unit.